To whom does a Jew pray? Can He be described? Does He have a name? No, there is no description with which to imagine Him, no name with which to grasp Him. Even the pronoun “Him” discloses too much to be true—as though He were something that is here or not here, hidden or revealed. As though He were only light. But He is not light. He is the source of light. At the source of all light, there is no hiddenness or revelation, no being or not being. There is only “You.” Here, now, known to...